UNION gear hangers - Technical information
Gear hangers are designed to bend or break, in order to avoid more expensive damage to your frame. Therefore gear hangers are originally made from 6061 cold forged aluminium, mostly anodized in a silver colour. The hardness matches the level that ensures that external forces or impacts will not bypass the gear hanger and damage the dropout part of your frame. Never bend back a gear hanger. First of all it is quite difficult to get it precisely aligned, but it is also very dangerous. Bent gear hangers tend to have a change in hardness and this could cause a sudden snap of the hanger at future impact, leading to serious accidents.
There are many different models for gear hangers. This is caused by the fact that the design of the gear hanger is related to the design of the dropout part of the frame. Most frames are not made by the bike manufacturers themselves, but by frame makers that supply the frames to the final bike manufacturer. Therefore most gear hangers will fit bikes from different bike brands, because the frames come from the same source.
All Marwi's gear hangers are 100% the same as the original gear hanger on your bike, made by the same frame manufacturer. Therefore the correct hardness is guaranteed for future impacts. Please be careful using other than original gear hangers, especially the ones made by CNC from 6061 or 7075 aircraft grade aluminium. They might be too hard and cause future damage to your frame. Mostly that will be the end of your bike, for sure when you have a carbon frame.
Therefore choosing an original hanger from Marwi is your safest choice.